Milking-machine.



PATBNTED JUL T31, 1906.

G. HUTQHINSON. MILKING MACHINE. APPLIQATION FILED MAR. 5, 1906.

5 $HEETSSHEET 1,

I JZ ZZrn ey No. 927,311. PATENTED. JULY 31; 1906.

. G, HUTGHINSON.

MILKING MACHINE. APPLIUATION FILED MAR. 5 1906- a SHEETS-SHEET 2.

PATENTED' JUiY 31,1906.

G. H'UTGHINS'ON. MILKING MACHINE.

APPLIOATIONI'ILED MAR. s. 1906.

a SHEETS-SHEET 4.

PATENTED JULY 31, 1906. G. HUTQHINSON. MILKING MACHINE. APPLICATION FILED MARPG. 1906.

5 SHEETS-SHEET 5 zg'au "m f ls [raven/$07- E UNiTnD srns 'PAENT orirron,

GEORGE HUTCHINSON, OF SEATOUN; NEW ZEALAND.

: To all whom it may concern:

Be it known that I, GEORGE Ho'roHrNsoN,

a a subject of His Majesty the King of Great Britain and" Ireland, residing at Seatoun,-

Wellington, in the Colony. of NewZealand,

-have invented certai'n'new and useful Impro'vements in 'Milking-Machines, of which the following is a specification.

This invention relates to milking-machines in whichfiuid under pulsative pressure is used within teatepres'ses to express milk from the teat of the animal. a j

The present invention provides improvements as follows: first, in gear for supporting the teat-presses'; second, in the construction of the teat-presses; third, in apparatus for producing pulsative pressure, air being the fluid employed. These improvements are hereinafter fully described and are'illustrated in the drawings, whereinlf Figure. 1 ,is a side elevation of'a milkingmachine.

' Fig. 4 is a sectional elevation on 4 4, Fig. 2, but showing the working parts in another position. Fig. 5 is an end sectional elevation of an overhead beam and suspending bracket and spring.

Fig. 6 is a plan, and Big. 7; a sectional elevation on 7 7, Fig. 6, ofthe lower part of a bodybow with under arm connected. Fig. 8 is an enlarged transverse sectional elevationon 8 8 Fig. 7. Fig. 9 is a side elevation of a teatpress. Fig. .10 is 'a plan thereof; Fig. 11, a

. section on 11 11, Fig, 10; '11, a section on 12 12,Fig.'1'1.

, al elevation, of a ball-and-socket. joint connecting a press to its carrying-arm. Fig. 14 is a side elevation,

elevation on'18 18 Fig. 17.

and Fig. 15 aplan, of a teat p ress fitted with a tubular protector. Fig. 16\is an enlarged .side elevation of the pulsatingjpumps. Fig. 17 is a plan thereof." Fig. l8 lis a sectional Fg. 19 is a side sectional elevation andrFigQ 20h corresponding elevation, of air-inlet valvels and device for holding same open. Fig. 2 j is a plan of piston-rod ends With levers in section.

Similar ii ures'of reference indicate the same partsnt roughout the figures. Referring fir'st'toFigs. 1, :2 and 5, the pole. 1, of springy Wood, upon thich slides the socket 2, carrying-the bodytbow 3,.is secured upon one end of a bow-spring 1, the

opposite end of said bow-spring being connected to the overhead beam 5 py a bolt 6 Specification of Letters Pater-.15. Application filed March 5.1906. Qerial No. soaezz.

Fig. 2 is a plan thereof. Fig. 3 is a corresponding front elevation.

Fig. 12 1sf=a side elevation, and Fig, 13 ajcentral secti i MILKING-MACHINE.

I Patented .1111, 21. 1906.

larly to. Figs. 6 and-7, the body-bow 3 has fixed upon ts lower end'the bracket 12 to receive the end of the under arm 13. The end: of thennder. arm has an arc-shaped recess 14, 7o

which fits-a correspondingly-shaped rojection 15in'the upper part of the brac ret 12. Beneath the under arm is a curved projection 16, fopmed to a radius struck from the same centerjfrom. which is struck the arc of the recess 1 1 The projection 16 fits a correspondingly-cnrved recess 17 in the bracket, and a set-pint, 18i'n the bracket bears upon the end of the ,imder arm and can be screwed or unscrewed toladjnst the position of the .under arm in relation'to the body-bow so that it is horizontal when in use. By'this arrangement the under arm is held thoroughly secure, as its 'eind cannot leave the bracket until its outerjendis raised. A pad 19, of leather 8 5 stuffed with horsehair, is carriedn on the end ofthe under arm, which is shape so that the pad fits against the body of the animal. .The pad is ,fsewed to, metal brackets 20,

screwed u on; and, as clearly shown in Fig.- 8', 6

each brac retihas a fin 20, which projects up- Wardly in the middle of the pad and causes it i to maintain its\ sha'pe and retain its position laterallyi 0 'Reierring now ,to Figs. 9, 10, and, 11, th teat-press according to'my present inventiofi resembles in principle those which have prejviously been patented by. me in so much thajt ..-it has superposed inflatable pouches, the upg,

ioc

per of which are made to squeeze the teat an prevent the upward passage of milk, while the lower pouches express it from the teat. Myprescnt invention provides an improy ed mode of connecting the pouches to the on, or wall of the teat ress, whereby they are readily removable or cleaning and the like.

The'pouches 21 upon one side of the p ess have a metal plate 23, which is secured toithe side of the pouches by a piece of 'rubliercoated fabric 25, cemented over it Thejopposing pouches 22 have a plate 2 1 secured to them in a similar manner. Each of these plates has a projecting ear 26 and 27, respectively, which take into grooves 28 and 29, formed for their reception in the inner face of the end 30 of the outer Wall of the teat-press. The projections fitting the grooves hold the sides of the pouches against the outer wall and as said grooves extend only about half the depth of the wall prevent the pouches from going too far down when passed into po sition from the top of the press. The outer wall has a gap 31 at its forward end to admit the-tubes 32 and 33, conveying the pulsating fluid to the upper and lower pouches, respectively, and a screw-pin 34, passing through one side of the outer wall and screwing into the other side, prevents the pouches from rising up and ties the opposite side of the outer Wall together.

The teat-press is connected to the end of a jointed adjustable arm 35 (one arm being employed for each press, as clearly shown in Fig. 1) by the improved form of ball-and-socket joint. (Shown in Figs. 12 and 13.) From the outer Wall of the press projects a pin 36,

'upon the end of which is a steel ball :37. This ball fits a conical recess 38 in the end of the the socket.

Referring now to Figs. 14 and 15, the teatpress is fitted with a removable tubular sleeve 42, of sheet-rubber or the like, which, as shown in dotted lines in Fig. 14, is hellmouthed at each end to enable it to be folded over the top and bottom of the press, its ends being secured in position by a rubber bandeifi. m 7

Referring now to Figs. 1 to 1, inclusive, and Figs. 16 to 21 inclusive the air-pump cylinder 50 is fitted with. a piston 51 upon a rod 52, upon. the end. of which is fixed a aw 53, having a disk-shaped boss 69, iittingover a head 44 (see Fig. 21) on the side of an 0scil lating lever 54, a draw-pin 55 in said jawpassin through one or other of a plurality of ho cs 68 in said lever, which oscillates upon a bar 56, fixed in the standards 57 and 58, extending upwardly-from the foundation-frame 59. A friction-roller 60, revolubly mounted u on the back of the lever, cngagcsthe face 0' a cam 61, fixed upon the shaft 62, journaled in bearings 45 in the found ation-frame 59 and revoluble from any convenient source of power. A spiral spring 63, connected to the lever at one end and at its opposite end to a rocking standard 64-, tends to keep the fricseven.

tion-roller in contact with the cam. The rocking standard at its lower end is pivoted upon the foundation-frai'ne 59 and at its upper end has pivoted upon it an arm 65, which has a handle 66 at its opposite end and is pivotallv connected to one end of short arm 67, which is journaled at its other end upon the bar 56. Similarly the cylinder 70 is fitted with a piston 71 upon a rod 72, having a aw 73 fitting over a curved oscillating lever 74, a pin 75 in said jaw passing through one or other of a plurality of holes 76 in said lever,.

which oscillates upon the bar 56. A friction roller 77, revolubly mounted upon the hack of the lever, engages the face of a' cam 78, fixed upon the shaft 62. A spiral. spring 7 9 connected to the lever 74 at one end and at the opposite end to the rocking standard 64, tends to keep the friction-roller in contact with the cam; The bottom of the cylinder 50 is connected by a tube 80 with all the upper pouches of the teat-prcsses forming a milking set, and the cylinder 70 is connected by a tube 81 with all the lower pouches of the same series of presses, and it is arranged by the shaping of the cams that the air from the cylinder 50 is forced into the upper pouches slightl y in advance of the forcing of the air into the lowcrpouchcs; but the air is withdrawn from the upper and lower pouches simulta neously. The cylinders 50 and 70 have a spindle S7 at right angles to their axes and fixed in hearing-lugs 88 upon cylinder 50 and similar lugs .91 upon cylinder 70. This spindle fits into open bearings 89 in the foundation a frame 59. The lugs 88 and 91 are shaped so that in passing the spindle into the bearings 89 they clear plates and 92, extending across the frame at the rear of the bearings. When the axes of the cylinders are out of the vertical, then these plates by coming in contact with the lugs prevent the spindle from rising in the bearings 89. The draw-pins 55 and 75 slide horizontally through the jaws 53 and 73 and are simultaneously operable to release them. from the holes in the oscillating levers and to adjust their position thereon by the following mechanism: Bell-crank levers and 101, (see Fig. 21,) one for each of the drawins 55 and. 75, are pivoted upon the respectivejaws 53 and 73 and are connected by the links 104 with a transverse handle 105, extending between the piston-rods 52 and 72 and having openings 106 and 107, one at each end, each openingreceiving one of said rods. Each of the bell cranks passes through a slot formed for its reception in the draw-pin it operates, a split pin 109 passing through the draw-pin behind the en( ofthe bell-crank lever to prevent the bell-crank leaving the slot. Tailpieces 110, one upon each bell-crank, limit their vibration by coming into contact with the respective piston-rods, and wire springs 111 and 112 normally tend to project journaled upon the spindle 87, extends parallel with and between the piston-rods 52 and 72 and has across-b91114, having loops 115 and 116, one at each end, each loop receiving one of the piston-rods, which has free plav' therein. The cross-bar serves as a handle for removing the cylinders out of the frame and in adjusting the jaws upon the oscillating levers. Each of the pistons forces air into and draws air out of the teat-presses to which it is connected. The levers 54 and 74 are formed to a radius struck from the center of the spindle 87, upon which center the cylinders50 and 70 oscillate. The levers are so suspended'from the bar56 that no matter what position the. j aws may occupy thereon the pistons reach the bottoms of the cylin-- ders at the end of each stroke. The length .of stroke of the pistons, and consequently the compression of air in the pouches, is regulated by a valve-12$ with its cylinder. The two valves are simil rlyconstructed, as clearly shown in.

the sectional view, Fig. 19, of the drawings, 11 and the same reference-figures are usedto in; dicate the corresponding parts. Each valve .ihas a casing 123, which receives the fluted gplunger 124, having stem 125. Upon the stem is threaded a leather washer 126, which closes a port 127, through which air is admi tted to (the air-passage 128. in communication upon the one side with the pum -cylinder and u eon the other side with t e tube leading to 'he pouches of the teat-presses. A spring 129 tends to keep the valve closed. In

order to keep the valves down and the ports open for the, purpose of easily removing the jaws from theoscillating levers, a hood 130, pivoted at each end upon the valve-casing at 131 and 132,,jis'shaped so that its under-face 133 is inclined as regards the valve-stems 125 and can be turned over the to s of said stems in order toforcedown the actidn ofthe springs 129.

When the machine is in operation, the arm 65,- before referred-to, is in such position that the ptgirt of connectionhetij een it and the short arm 67 is below. a line drawn from the center-Rot the bar 56 to the poipt at which the arm v is connected to the end of the rocking standard 64', and as the under side of the end of the arm 65iis supported by the bar 56 the springs are held extendedgiyWhen it is desired to stop the action of themachine, the

tering the position of the jaws u on'the levers, the maximum stroke being 0 -tainedthe air-valve 120 of the cylinder 50 is (5011-. nectedto the similarval've 1210f thecylin der 70, a flexible tube 122 connecting the v\a ves. against the press between the band securing said en' s,

arm 65 is raised by its handle, With the re sult that the upper end of the rocking standard 64 is move rearwardly and the tension of the springs is released. I At the same time I. In suspensory apparatus of milking-machines in combination, a at one end thereof which itis connected to an overhead beam, a tension-spring at the opposite end of said pole and a notched bracket upon said. beam from which the tension-spring is supported, substantiallyas specified. I

2. The means for connecting the under pole, a bow-spring 7' to the body-bow comprising in combination,

the body-bow, a bracket securedupon the endthereof adapted to receive the end of the under arm, a curved recess upon the upper edge and a curved projection upon the under edge of the end of said arm and a curved projection and a curved recess in said bracket to receive and engage respectively with the'projection andrece s in the end of the arm and a set-pin screwin through the bracket engagin with and re ating the position of the sai arm, substantially as specified.

3. In combination the under arm shaped at its end to the contour of the body of the animaha stufied pad fitting such sha ed portion and a fin upon the upper ed e o the 1111- substantially as specified 4. Thecombination in means for connecting a teat-press to a carrying arm of a ball upon a stem projecting from the teat-press, a recess in the end of-the arm to receive the ball, saw-cuts in said recessed. end, anda socket screwing upon said end substantially as specified. I 5. A teat-press having rigid outer walls integrally formed, collapsible pouches within said walls, a recess in one of said walls to receive the tubes conveying air to the pouches, and a screw-pin passing throu hone wall and screwing into the opposite wal or holding the, pouches in position, substantially as specified. 6. I In a'teat-pressthe combination with the collapsible pouches of metal plates secured to said pouches adapted to coincide with walls of thepress and a projection from each plate adapted to take into a corresponding channel in one of the walls, substantially as specified.

7. In a teat-press the combination therewith of artubular sleeve passing through the opposing collapsible pouches and having its ends folded over the top and'bottoniof the ress and an elastic substantially as specified.

In a milking-machine in combination teat-presses having upper and lower collapsible pouches within a rigid outer wall, airpumps connected one to the upper and one to the lower of said pouches, and means for per and the ot er to the lower of said pouches, means for reciprocating the pistons of'said pumps and valves to admit air to said pumps substantially as specified and illustrated.

10. independent upper and lower collapsible pouches, air-pum s connected 'one'to the upper and the ot er to the lower of said pouches, means for adjusting the stroke of the pistons of said air-pumps to regulate the pressure in said pouches-means for reciprocating said pistons and valves to admit air to said pumps when required by the variation of the stroke of the pistons substantially as specified and illustrated.

11. In. combination teat-presses having upper and lower collapsible pouches, air pum s connected one to the upper and one to t e lower of said pouches, a trunnionspindle carried in lugs projecting from said cylinders, a foundation-frame and bearings thereon receiving said spindle, a piston reciprocable within each cylinder,.a rod for each piston and a jaw Witha draw-pin upon each rod, oscillating levers depending from a bar fixed in said found ation-frar ie, the levers having holes to receive said draw-pins, a shaft journaled. in the foundation-frame, cams upon said shaft one for each lever, a friction-roller upon. each lever, springs adapted to draw the rollers into contact with the cams, a rocking standard pivoted upon the frame to which the said sprin s are connected, an arm connected to the roc ing standard, a lever pivoted upon a fixed bar pivotally connected to said arm, the arm extending rearwardly and engaging with said bar to hold In combination teat-presses having ghe springs extended substantially as speci- 12. In combination. teat-presses having upper and lower collapsible pouches, airpumlps connected one to the upper and one to t e lowerof said pouches, a trunnionspindle carried in lugs projecting from said cylinders, a foundation-frame and bearings thereon receiving said spindle, a pistonreciprocable within each cylinder, a rod for each piston and a jaw with a draw-pin upon each rod, oscillating levers depending from a bar fixed in said foundation-frame, the levers having holes to receive said draw-pins, a shaft journaled in the foundation-frame, cams upon said shaft one for each lever, a friction-roller upon each lever, springs adapted to draw the rollers into contact with the cams and means for throwing out of action the said sprin s substantially as s ecified.

13. In a -mil ing-machine in com ination teat-presses ha'ving upper and lower collapsible pouches, oscillating air-pum s connected one to the upper and one to the ower of said pouches, oscillating levers for reciprocating the pistons of said. air-pumps, means for actuating said levers and meansfor connecting the ends of the rods of said pistons to sai levers, substantially as specified.

14. In a milking-machine in combination teat presses having upper and lower collapsible pouches, oscillating air-pumps connected one to the upper and one to the lower of said pouches, jaws one upon the piston-rod of eachpump, a draw pin slidable in each jaw and means for operating said draw-pins, oscillating levers towhich the jaws are ad justably connected and means for oscillating saidlevers, substantially as specified.

In testimony whereof I have signed my name to this specification, in the presence of two witnesses, this 21st day of December, 1905.

GEORGE HUTCHINSON.

Witnesses:

HENRY JOHN PRIOR, ERNEST SMITH BALDWIN. 

